摘要:
An ethylene-.alpha.-olefin copolymer composition comprising two ethylene-.alpha.-olefin copolymers which are different in density, intrinsic viscosity and the number of short chain branching per 1000 carbon atoms. Extrusion processed materials, injection molded materials and films obtained from said composition are excellent in strength.
摘要:
An infrared radiation absorbing film suitable for agricultural purposes comprising a first layer of olefin resin containing an amorphous hydrated aluminosilicate gel and optionally, additional layers of an olefin resin encompassing said first layer.
摘要:
A vibration-damping material with excellent workability consisting of two metal plates and a vibration-damping layer of a thermoplastic resin interposed between the two metal plates, in which the vibration-damping layer of a thermoplastic resin consists of a film as a middle layer and a polyolefin type resin (B) provided on both sides of the film as an upper and lower layer, the film as the middle layer being composed of (1) at least one resin (A) selected from the group consisting of polyolefin type resins and ionomer resins each having a modulus of elasticity in shear at 20.degree. C. of 3.times.10.sup.9 to 1.times.10.sup.7 dyne/cm.sup.2, a percentage of elongation at 20.degree. C. of 50% or above and a peak temperature of dissipation factor (tan .delta.) of -120.degree. C. to 80.degree. C. or (2) a resin mixture of the resin (A) and a synthetic rubber having a percentage of elongation at 20.degree. C. of 100% or above and a peak temperature of dissipation factor (tan .delta.) of -120.degree. to 50.degree. C., and the polyolefin type resin (B) having a modulus of elasticity in shear at 20.degree. C. larger than that of the resin (A), a percentage of elongation at 20.degree. C. of 10% or above, a peak temperature of dissipation factor (tan .delta.) of -40.degree. to 180.degree. C. and a bonding strength toward the metal plates at 20.degree. C. and 180.degree. -peeling of 3 kg/cm or above.
摘要翻译:一种具有优异的可加工性的减振材料,由两块金属板和一块热塑性树脂构成的隔热层之间夹在两块金属板之间的隔热层组成,其中热塑性树脂的减震层由一层作为中间层的薄膜和 设置在作为上下层的膜的两面上的聚烯烃类树脂(B),作为中间层的膜由(1)至少一种选自聚烯烃类树脂和 各自具有在20℃剪切下的弹性模量为3×10 9至1×10 7达因/ cm 2的离聚物树脂,20℃下的伸长百分比为50%或更高,并且散热因子(tanδ)的峰值温度为 120℃〜80℃或(2)树脂(A)和20℃下的伸长率为100%以上的合成橡胶的树脂混合物和峰值温度(tanδ delta)为-120〜50℃,聚烯烃类树脂 (B)在20℃下的剪切弹性模量大于树脂(A)的弹性模量,20℃下的伸长率为10%以上,耗散因子峰值温度(tanδ) -40℃至180℃,并且在20℃下对金属板的粘结强度和3kg / cm 3以上的180°剥离。
摘要:
An infrared radiation absorbing film suitable for agricultural purposes comprising a first layer of olefin resin containing an amorphous hydrated aluminosilicate gel and optionally, additional layers of an olefin resin encompassing said first layer.
摘要:
A packaging transparent propylene copolymer film stretched in at least one direction, which consists of a copolymer of propylene and an .alpha.-olefin having 4 or more carbon atoms or a copolymer of propylene, an .alpha.-olefin having 4 or more carbon atoms and ethylene. The copolymer satisfies the following conditions;(1) the content of the .alpha.-olefin having 4 or more carbon atoms in the copolymer is 8-25 mole %,(2) the content of ethylene in the copolymer is 5 mole % or less,(3) the content of a cold xylene-soluble portion in the copolymer is 15-50% by weight, and(4) the flexural modulus of the copolymer is 2,500-7,000 kg/cm.sup.2.
摘要翻译:由至少一个方向拉伸的包装透明丙烯共聚物膜,其由丙烯和具有4个或更多个碳原子的α-烯烃的共聚物或丙烯,具有4个或更多个碳原子的α-烯烃和乙烯的共聚物组成。 共聚物满足下列条件: (1)共聚物中具有4个以上碳原子的α-烯烃的含量为8〜25摩尔%,(2)共聚物中的乙烯含量为5摩尔%以下,(3)a 共聚物中的冷二甲苯可溶部分为15〜50重量%,(4)共聚物的挠曲模量为2,500-7,000kg / cm 2。
摘要:
A laminated polypropylene film consisting of a crystalline polypropylene layer having laminated to at least one side thereof a copolymer layer, said copolymer being a random copolymer of propylene and an .alpha.-olefin having 4 or more carbon atoms or a random copolymer of propylene, an .alpha.-olefin having 4 or more carbon atoms and ethylene obtained by vapor phase polymerization in the substantial absence of a liquid medium and satisfying the following conditions (1) to (4):(1) the content of an .alpha.-olefin having 4 or more carbon atoms in the copolymer is 8 to 25 mole %,(2) the content of ethylene in the copolymer is 3 mole % or less,(3) the content of a cold xylene-soluble portion in the copolymer is 15 to 60% by weight, and(4) the content of a boiling n-heptane-insoluble portion in the copolymer is 7% by weight or more. Said laminated film has an excellent low-temperature heat-sealability, an excellent transparency, a low blocking and a good scratch resistance.
摘要:
A packaging shrink film consisting essentially of a random copolymer of propylene and an .alpha.-olefin having 4 or more carbon atoms or a random copolymer of propylene, an .alpha.-olefin having 4 or more carbon atoms and ethylene, said random copolymer satisfying the following conditions:(1) the content of an .alpha.-olefin having 4 or more carbon atoms in the copolymer is 8 to 30 mole %,(2) the content of ethylene in the copolymer is 3 mole % or less,(3) the content of a cold xylene-soluble portion in the copolymer is 15 to 60% by weight, and(4) the content of a boiling n-heptane-insoluble portion in the copolymer is 7% by weight or more, said film having been stretched. The packaging shrink film is soft and excels in low-temperature shrink characteristics as well as in transparency and gloss.
摘要:
An insect pest-repelling film or sheet is disclosed, having a reflective spectrum in a ultraviolet region of a wavelength of less than 0.4 .mu.m, particularly a reflective spectrum peak at a wavelength of less than 0.4 .mu.m, a reflective spectrum having not less than 1.4 of a ratio (R.sub.A /R.sub.B) of the ultraviolet reflectance (R.sub.A) and a visible light reflectance of a wavelength of 0.5 .mu.m (R.sub.B) and a visible light transmission of not less than 40%. The film is useful as a cover of houses and tunnels or mulching of ground for crop culture or as a repellent for various insect pests in agriculture, forestry, and gardening.
摘要:
A mulching film which comprises a reflective film layer having a reflective peak at a wavelength of less than 0.4 .mu.m and a reflective spectrum having not less than 1.4 of a ratio (R.sub.A /R.sub.B) of the ultraviolet peak reflectance (R.sub.A) and the visible light reflectance at a wavelength of 0.5 .mu.m (R.sub.B) and a black film layer, which is effective for repelling insect pests harmful for various crops and other plants by covering ground for plantation and for lowering of the underground temperature and also for the prevention of the propagation of weeds.
摘要:
A breathable film and a process for producing the same are disclosed, the breathable film comprising a resin composition comprising (1) 100 parts by weight of a linear low-density polyethylene resin having a density of from 0.870 to 0.915 g/cm.sup.3 and containing from 15 to 50% by weight of a component which is extractable with xylene at room temperature and which has a weight average molecular chain length of from 1,000 to 9,000 .ANG.; (2) from 50 to 400 parts by weight of a filler; and optionally, (3) from 0.5 to 8 parts by weight of a nonionic surface active agent. The breathable film of the invention not only has excellent film moldability and film stretchability but also shows high breathability, good touch and appearance, and high strength.